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Information About the May 10, 2010
Tornado Outbreak in Oklahoma

Public Information Statement about Tornado Damage Paths
Issued at 5/13/2010 2:53 pm CDT

NOUS44 KOUN 131954
PNSOUN
OKZ004>048-050>052-TXZ083>090-140200-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
253 PM CDT THU MAY 13 2010

...ADDITIONAL DAMAGE SURVEY RESULTS FROM MAY 10TH OUTBREAK...

REMEMBER THAT THIS INFORMATION IS SUBJECT TO CHANGE PENDING FURTHER
INVESTIGATION. WE ARE STILL INVESTIGATING OTHER DAMAGE AREAS AND IT
WILL TAKE SOME TIME TO COMPILE THE DETAILS OF EACH STORM.

AT LEAST FOUR ADDITIONAL TORNADOES HAVE BEEN CONFIRMED WHICH BRINGS
THE NUMBER OF CONFIRMED AND COMPLETELY SURVEYED TORNADOES TO 14 IN
THE NWS NORMAN COUNTY WARNING AREA. IT IS IMPORTANT TO NOTE THAT WE
HAVE VISUAL EVIDENCE ON A NUMBER OF OTHER TORNADOES AND ARE STILL
INVESTIGATING THOSE...SO THE TOTAL TORNADO COUNT IS LIKELY TO
CONTINUE TO RISE.

THE FIRST THREE TORNADOES INDICATED BELOW WERE SPAWNED BY THE SAME
LEFT-MOVING PARENT SUPERCELL THUNDERSTORM. THE LAST TORNADO WAS
SPAWNED BY A LATER THUNDERSTORM.


...BRAY TO COX CITY ANTICYCLONIC TORNADO...

RATING: EF-1
MAX WIDTH: 0.4 MILES
PATH LENGTH: AROUND 6 MILES
BEGIN POINT: ABOUT 3.1 NE BRAY
END POINT: ABOUT 2.6 ESE COX CITY

THIS TORNADO CROSSED FROM NORTHEAST STEPHENS COUNTY INTO SOUTHEAST
GRADY COUNTY. BASED ON RADAR SIGNATURES AND AN EYEWITNESS
ACCOUNT...THIS TORNADO WAS AN ANTICYCLONIC TORNADO MEANING THAT THE
TORNADIC CIRCULATION WAS ROTATING IN A CLOCKWISE DIRECTION. THERE
WAS SOME DAMAGE TO STRUCTURES ALONG THE PATH...AND IT CONVERGED
TOWARDS THE CENTER...INDICATIVE OF A TORNADO RATHER THAN
STRAIGHT-LINE WIND DAMAGE. SOME FENCES...TREES...AND POWER POLES
WERE DOWNED. GRADY COUNTY EMERGENCY MANAGEMENT SAID THERE WERE ABOUT
20 POWER POLES DOWNED ALONG A 4 MILE STRETCH. THERE WAS ALSO SOME
MINOR DAMAGE TO A FEW MOBILE HOMES.


...WAYNE OK ANTICYCLONIC TORNADO...

RATING: EF-1
MAX WIDTH: 3/8 TO 1/2 MILE
PATH LENGTH: AROUND 4.6 MILES
BEGIN POINT: ABOUT 7.0 WSW WAYNE
END POINT: ABOUT 2.6 W WAYNE

THIS TORNADO CROSSED OCCURRED IN SOUTHERN MCCLAIN COUNTY. BASED ON
RADAR SIGNATURES AND OBSERVED DAMAGE PATTERNS...THIS TORNADO WAS
ALSO AN ANTICYCLONIC TORNADO. THE MOST NOTABLE DAMAGE ALONG THIS
PATH INCLUDES DAMAGE TO THE MID AMERICA TECHNOLOGY CENTER...AT WHICH
DAMAGE ESTIMATES TOTAL TO AROUND A HALF MILLION DOLLARS. SOME AC
UNITS WERE BLOWN OFF THE ROOF...AND SOME DOORS WERE BLOWN IN. ONE
OBSERVER SAID HE SAW WHAT APPEARED TO BE A LARGE DUST DEVIL AND
THOUGHT IT WAS UNUSUAL BECAUSE THE TORNADO WAS NOT WHERE HE WOULD
HAVE EXPECTED IT TO BE IN A THUNDERSTORM.


...WAYNE OK CYCLONIC TORNADO...

RATING: EF-0
MAX WIDTH: 100 TO 150 YARDS
PATH LENGTH: AROUND 3/4 MILE
BEGIN POINT: ABOUT 6.8 WSW WAYNE
END POINT: ABOUT 6.1 W WAYNE

THIS TORNADO IS THOUGHT TO BE A BRIEF CYCLONIC SPIN-UP AS AN
OFFSHOOT OF THE PRIMARY ANTICYCLONIC CIRCULATION NEAR WAYNE. A GAP
IN DAMAGE WAS NOTED TO THE NORTH OF THE MAIN ANTICYCLONIC TORNADO
TRACK BEFORE THE DAMAGE ASSOCIATED WITH THIS TORNADO WAS OBSERVED.
DEBRIS FROM A SHED WAS BLOWN TO THE NORTHWEST...MORE INDICATIVE OF A
CYCLONIC CIRCULATION AND INCONSISTENT WITH THE DAMAGE PATTERNS FOUND
JUST TO THE SOUTHEAST.

OCCASIONALLY...WITH CYCLONIC TORNADOES...BRIEF ANTICYCLONIC
TORNADOES WILL BE OBSERVED. IT IS THOUGHT THAT JUST THE OPPOSITE
OCCURRED IN THIS CASE.


...LEXINGTON AREA / SOUTHERN CLEVELAND COUNTY TORNADO...

THIS DAMAGE SURVEY INFORMATION IS ONLY VERY PRELIMINARY. NO RATING
HAS BEEN ASSIGNED YET...BUT THE DAMAGE WAS MORE CONSISTENT WITH A
WEAK TORNADO...IN THE EF-0 OR EF-1 RANGE.

THE FIRST DAMAGE WAS OBSERVED JUST NORTH OF HIGHWAY 39 ABOUT 7.2
MILES EAST OF LEXINGTON. SPORADIC TREE DAMAGE WAS NOTED UNTIL THE
DAMAGE PATH ENDED AROUND 9 MILES EAST OF LEXINGTON. SOME MOBILE
HOMES WERE ALSO DAMAGED...BUT IT WAS MOSTLY JUST MINOR ROOF DAMAGE
OR MINOR DAMAGE TO THE SIDING OF THE HOMES.

A VERY CONCENTRATED AREA OF WEAK DAMAGE WAS ALSO NOTED JUST NORTH OF
HIGHWAY 39 AND FISHMARKET ROAD. THIS HAS NOT BEEN CLASSIFIED AS A
TORNADO YET...AND FURTHER ASSESSMENT IS NEEDED.


$$

AL

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